Alcohol's effect on blood sugar is one of the trickiest topics in diabetes. It can cause highs and lows — sometimes in the same night.
Why it's confusing
- **Sweet drinks** (margaritas, daiquiris, dessert wines) cause immediate highs from sugar
- **All alcohol** blocks the liver from releasing stored glucose for 8–12 hours, causing delayed lows
- Lows can hit at 3 AM after a few drinks at dinner
Best low-carb choices
| Drink | Net carbs |
|---|---|
| Vodka, gin, whiskey, tequila (straight or with soda water) | 0g |
| Light beer (Michelob Ultra, Miller Lite) | 2–3g |
| Dry red wine (5 oz) | 3–4g |
| Dry white wine (5 oz) | 3–4g |
| Dry champagne (5 oz) | 1g |
Worst choices
| Drink | Net carbs |
|---|---|
| Margarita | 30–40g |
| Piña colada | 50g+ |
| Mojito | 15–20g |
| Regular beer (12 oz) | 12–15g |
| Sweet dessert wine (5 oz) | 18g+ |
| Long Island iced tea | 30g+ |
Safer drinking with diabetes
- **Never drink on an empty stomach** — eat first
- **Hydrate**: water between drinks
- **Check glucose before bed** — if under 100 mg/dL, eat a small snack
- **Set an alarm for 3 AM** if you've had more than 2 drinks
- **Tell whoever you're with** that severe lows can look like drunkenness
- **Carry glucose tabs** in your purse/wallet
A note on type 1
Alcohol significantly raises hypo risk for hours. Many type 1s reduce basal insulin overnight after drinking. Coordinate with your endocrinologist.